255420866 has 16 divisors (see below), whose sum is σ = 387288000. Its totient is φ = 126332208.

The previous prime is 255420799. The next prime is 255420871. The reversal of 255420866 is 668024552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76745 + ... + 80003.

It is an arithmetic number, because the mean of its divisors is an integer number (24205500).

Almost surely, 2^255420866 is an apocalyptic number.

255420866 is a deficient number, since it is larger than the sum of its proper divisors (131867134).

255420866 is a wasteful number, since it uses less digits than its factorization.

255420866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 255420866 is about 15981.8918154266. The cubic root of 255420866 is about 634.4812478532.

The spelling of 255420866 in words is "two hundred fifty-five million, four hundred twenty thousand, eight hundred sixty-six".